NDLI: Fabrication of a mini multi-fixed-point cell for the calibration of industrial platinum resistance thermometers

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Fabrication of a mini multi-fixed-point cell for the calibration of industrial platinum resistance thermometers

Content Provider	Scilit
Author	Ragay-Enot, Monalisa Lee, Young Hee Kim, Yong-Gyoo
Copyright Year	2017
Description	Journal: Measurement Science and Technology A mini multi-fixed-point cell (length 118 mm, diameter 33 mm) containing three materials (In–Zn eutectic (mass fraction 3.8% Zn), Sn and Pb) in a single crucible was designed and fabricated for the easy and economical fixed-point calibration of industrial platinum resistance thermometers (IPRTs) for use in industrial temperature measurements. The melting and freezing behaviors of the metals were investigated and the phase transition temperatures were determined using a commercial dry-block calibrator. Results showed that the melting plateaus are generally easy to realize and are reproducible, flatter and of longer duration. On the other hand, the freezing process is generally difficult, especially for Sn, due to the high supercooling required to initiate freezing. The observed melting temperatures at optimum set conditions were 143.11 °C (In–Zn), 231.70 °C (Sn) and 327.15 °C (Pb) with expanded uncertainties (k = 2) of 0.12 °C, 0.10 °C and 0.13 °C, respectively. This multi-fixed-point cell can be treated as a sole reference temperature-generating system. Based on the results, the realization of melting points of the mini multi-fixed-point cell can be recommended for the direct calibration of IPRTs in industrial applications without the need for a reference thermometer.
Related Links	http://iopscience.iop.org/article/10.1088/1361-6501/aa7274/pdf
ISSN	09570233
e-ISSN	13616501
DOI	10.1088/1361-6501/aa7274
Journal	Measurement Science and Technology
Issue Number	7
Volume Number	28
Language	English
Publisher	IOP Publishing
Publisher Date	2017-06-19
Access Restriction	Open
Subject Keyword	Journal: Measurement Science and Technology Multi Fixed Point
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Instrumentation Engineering

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